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Thu, 01 Oct 2020 10:55:45 -0700 (PDT) Date: Thu, 1 Oct 2020 19:55:39 +0200 From: elver@google.com To: Andrey Konovalov Cc: Dmitry Vyukov , Vincenzo Frascino , Catalin Marinas , kasan-dev@googlegroups.com, Andrey Ryabinin , Alexander Potapenko , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , Will Deacon , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 21/39] kasan: don't allow SW_TAGS with ARM64_MTE Message-ID: <20201001175539.GQ4162920@elver.google.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.14.5 (2020-06-23) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Does that patch title need an ", arm64" in it, like the others? On Fri, Sep 25, 2020 at 12:50AM +0200, Andrey Konovalov wrote: > Software tag-based KASAN provides its own tag checking machinery that > can conflict with MTE. Don't allow enabling software tag-based KASAN > when MTE is enabled. > > Signed-off-by: Andrey Konovalov > Signed-off-by: Vincenzo Frascino > Reviewed-by: Catalin Marinas > --- > Change-Id: Icd29bd0c6b1d3d7a0ee3d50c20490f404d34fc97 > --- > arch/arm64/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index e7450fbd0aa7..e875db8e1c86 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -131,7 +131,7 @@ config ARM64 > select HAVE_ARCH_JUMP_LABEL > select HAVE_ARCH_JUMP_LABEL_RELATIVE > select HAVE_ARCH_KASAN if !(ARM64_16K_PAGES && ARM64_VA_BITS_48) > - select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN > + select HAVE_ARCH_KASAN_SW_TAGS if (HAVE_ARCH_KASAN && !ARM64_MTE) > select HAVE_ARCH_KGDB > select HAVE_ARCH_MMAP_RND_BITS > select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT > -- > 2.28.0.681.g6f77f65b4e-goog >